Better tests directory structure (#2231)

tests/utils/get_container_health.py

@@ -0,0 +1,10 @@
+# Copyright (c) Jupyter Development Team.
+# Distributed under the terms of the Modified BSD License.
+import docker
+from docker.models.containers import Container
+
+
+def get_health(container: Container) -> str:
+    api_client = docker.APIClient()
+    inspect_results = api_client.inspect_container(container.name)
+    return inspect_results["State"]["Health"]["Status"]  # type: ignore